全文获取类型
收费全文 | 18763篇 |
免费 | 2511篇 |
国内免费 | 178篇 |
专业分类
耳鼻咽喉 | 68篇 |
儿科学 | 300篇 |
妇产科学 | 264篇 |
基础医学 | 949篇 |
口腔科学 | 523篇 |
临床医学 | 5794篇 |
内科学 | 1348篇 |
皮肤病学 | 112篇 |
神经病学 | 662篇 |
特种医学 | 296篇 |
外科学 | 2387篇 |
综合类 | 2341篇 |
一般理论 | 1篇 |
预防医学 | 3917篇 |
眼科学 | 213篇 |
药学 | 1294篇 |
132篇 | |
中国医学 | 449篇 |
肿瘤学 | 402篇 |
出版年
2024年 | 29篇 |
2023年 | 434篇 |
2022年 | 520篇 |
2021年 | 1101篇 |
2020年 | 1157篇 |
2019年 | 1111篇 |
2018年 | 1040篇 |
2017年 | 983篇 |
2016年 | 1031篇 |
2015年 | 897篇 |
2014年 | 1368篇 |
2013年 | 1881篇 |
2012年 | 1017篇 |
2011年 | 1091篇 |
2010年 | 861篇 |
2009年 | 932篇 |
2008年 | 907篇 |
2007年 | 890篇 |
2006年 | 707篇 |
2005年 | 602篇 |
2004年 | 486篇 |
2003年 | 364篇 |
2002年 | 308篇 |
2001年 | 279篇 |
2000年 | 278篇 |
1999年 | 207篇 |
1998年 | 181篇 |
1997年 | 160篇 |
1996年 | 105篇 |
1995年 | 76篇 |
1994年 | 54篇 |
1993年 | 52篇 |
1992年 | 62篇 |
1991年 | 32篇 |
1990年 | 32篇 |
1989年 | 22篇 |
1988年 | 27篇 |
1987年 | 17篇 |
1986年 | 13篇 |
1985年 | 21篇 |
1984年 | 25篇 |
1983年 | 13篇 |
1982年 | 11篇 |
1981年 | 17篇 |
1980年 | 10篇 |
1979年 | 4篇 |
1978年 | 10篇 |
1977年 | 12篇 |
1976年 | 6篇 |
1975年 | 7篇 |
排序方式: 共有10000条查询结果,搜索用时 125 毫秒
51.
John A. Tomenson Graham A. Matthews 《International archives of occupational and environmental health》2009,82(8):935-949
Purpose The present investigation looks in detail at the causes and types of health incidents reported by 6,300 mainly smallholder
agrochemical users in 24 countries during 2005 and 2006.
Methods The investigation is based on a questionnaire survey of knowledge, attitude and practice that concentrated on the sequence
of events from purchasing the pesticide to disposal. Information was also collected about health problems experienced while
using agrochemicals. The survey targeted mainly smallholder knapsack spray operators who were expected to be at a highest
risk of exposure.
Results In the 12 months prior to interview, 1.2% of users reported an agrochemical-related incident that required hospital treatment,
5.8% reported an incident requiring at least trained medical treatment but not hospitalisation and 19.8% reported only a minor
sign or symptom. Users who had experienced an incident involving agricultural equipment were 3.38 (95% CI 2.29–4.99) times
more likely to experience an agrochemical-related health incident, but confident users who felt that their use of personal
protective equipment while spraying was best practice were 0.60 (95% CI 0.44–0.84) times less likely to experience such an
incident. Over 80% of product-related incidents were caused by insecticides and the incidence rate per spraying time for incidents
linked to insecticides was significantly higher than that for fungicides or herbicides. Headache/dizziness and nausea/vomiting,
often smell related, were the most common symptoms reported by users who listed agrochemical products that had caused them
health problems (52 and 38% of product mentions, respectively).
Conclusions In most countries, the incidence of serious health effects was low; however, there was a high incidence of minor signs and
symptoms in a few countries, especially in Africa. A disproportionate number of incidents occurred during insecticide use
relative to the time that they were sprayed. Failure to exercise caution as indicated by whether users had incidents involving
agricultural equipment or livestock, and lack of confidence in their practices were the most important predictors of agrochemical-related
incidents. 相似文献
52.
周新国 《南通大学学报(哲学社会科学版)》2003,19(3):24-28
张謇的教育思想十分丰富 ,并且具有鲜明的时代特点。他在江苏南通的教育实践成就卓著 ,极富特色。他较早地提出了教育为地方经济社会发展服务的思想 ,创造了“以实业辅助教育 ,以教育促进实业”的成功模式 ,反映了教育从边缘走向经济中心这一历史发展的趋势。张謇的教育思想与实践在近代中国教育史上有重要地位 相似文献
53.
Major progress in clinical pain assessment and management has been achieved in the last decade. More effective analgesic drugs and improved techniques for pain management have been introduced. However, medical reports published during the last few years on postoperative pain management (POPM) indicate that moderate or even severe pain is still rather commonly experienced by surgical patients in the early postoperative period and that worst-pain-episodes may occur even in the late postoperative phase. Insufficient relief of postoperative pain seems a more common problem on surgical wards than on a postanaesthesia care unit (PACU). The aims of POPM are to inhibit autonomic trauma-induced nociceptive impulses that may result in functional disturbances of vital organs and thereby affect the incidence of potentially severe complications influencing clinical outcome. Considering that recent studies continue to show sub-optimal pain management despite the availability of effective drugs and analgesic techniques it must be considered essential to identify possible barriers to effective pain management in clinical practice so that necessary improvements in POPM routines can be carried out. 相似文献
54.
顾玉平 《南通大学学报(哲学社会科学版)》2004,20(1):6-9
马克思登上哲学舞台伊始 ,就深怀着强烈的人道主义情愫 ,这种情愫逐步生长 ,最终构成了马克思历史观的基本内核。高扬自我意识 ,崇尚自由精神 ,吁求自然主义与人道主义和谐的共产主义 ,是青年马克思作为理想人道主义者的价值取向。从超验走向经验 ,以实践本体解构逻辑本体 ,马克思为自己的实践人道主义奠定了哲学基石。从现实的个人出发 ,批判非人的资本主义制度 ,谋求工人阶级的解放 ,并把人的自由而全面的发展作为最高价值诉求 ,马克思在社会历史发展的必然性中找到了人道主义的理想归宿 相似文献
55.
56.
Fiona C.L. Bull Ph.D. M.Sc. Elise C.C. Schipper M.A. Konrad Jamrozik M.B.B.S. D.Phil. FAFPHM Brian A. Blanksby Ph.D. M.Sc. Dip.Ed. 《Preventive medicine》1997,26(6):866-873
Background.Physical inactivity is recognized as an important public health issue. Yet little is known about doctors' knowledge, attitude, skills, and resources specifically relating to the promotion of physical activity. Our survey assessed the current practice, perceived desirable practice, confidence, and barriers related to the promotion of physical activity in family practice.Methods.A questionnaire was developed and distributed to all 1,228 family practitioners in Perth, Western Australia.Results.We received a 71% response (n= 789). Family practitioners are most likely to recommend walking to sedentary adults to improve fitness and they are aware of the major barriers to patients participating in physical activity. Doctors are less confident at providing specific advice on exercise and may require further skills, knowledge, and experience. Although they promote exercise to patients through verbal advice in the consultation, few use written materials or referral systems.Conclusions.There are significant differences between self-reports of current practice and perceived desirable practice in the promotion of physical activity by doctors. Future strategies need to address the self-efficacy of family physicians and involve resources of proven effectiveness. The potential of referral systems for supporting efforts to increase physical activity by Australians should be explored. 相似文献
57.
58.
59.
Summary UK health policy requires child and adolescent mental health service providers to demonstrate that their services are effective.
The FOCUS project has been developed to improve the availability and accessibility of research evidence and innovation, to
support purchasers in the effective commissioning of services and to help providers base service provision on evidence of
effectiveness and develop methods of evaluation. 相似文献
60.
O. A. MIRGHANI† E. O. EL AMIN† M. E. S. ALI† H. S. OSMAN‡ B. HAMAD§ 《Medical education》1988,22(4):314-316
The community-based course presented is a longitudinal course running through four semesters in the Faculty of Medicine, University of Gezira, Sudan. Students combine their regular work in primary health care centres with attachments to a number of families in Wad Medani town. They continue to visit these families regularly throughout their entire medical course with the aim of studying them and helping them with some of their medical and psychosocial problems. 相似文献